Monday 16 July 2012


Within the Haynes Home Plumbing manual I discussed at some length the pro’s and con’s of the various push-fit piping systems. 

Personally I avoid plastic pipework where I can for no other reason than I think copper looks better and is cheaper to work with – the pipes are about the same price but copper fittings are no where near the price of their plastic counterparts. That said, for the DIYer plastic piping is a Godsend.

At the time of writing Wavin had two products on offer; their old traditional Hep20 product, which could be recognised by its uninspiring battleship grey colour and the fact that you couldn’t get the fitting off with any ease once you’d managed to get it on, and their new product, which they were calling “In4Sure”.

Well a few weeks ago I popped into the local plumbing merchants to find them putting all the old grey hep20 fittings into bags for return to Wavin. It seems that two things have happened, firstly that the old grey system has been recalled and secondly that the chaps at Wavin are keen Startrek fans - In4Sure is now being heralded as the “The Next Generation hep20”. You can still find it called In4Sure but I suspect this name will be quietly dropped over the coming years to make way for “Hep20 Voyager”, and “Hep20 deep space 9”.

To be honest this is a well overdue move. The old hep20 wasn’t a patch on most of its rivals, whereas In4Sure contains a number of sound innovations that bounce it right back up there.

In terms of use nothing has changed from what I said in the book, although there are a few things that bear repetition: the pipework is nominally the same size as the competitor products (mainly Speed-fit) but it has a slightly smaller inside diameter, which means that a speed-fit pipe strengthener (or insert) can only be used if you’ve brought a hammer along for the job. In other words you can mix and match the fittings and pipes but always try to use a hep20 pipe insert for hep20 pipework and a speed-fit insert for its pipework. The other benefit of Hep20 is that the pipe itself seems far more flexible than that of its competitors, which can be very useful if you are trying to thread it through joists.

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